Siemens SINAMICS S120 - Active Line Modules

System overview
2.4 Line Modules
Cabinet Modules NEMA
30 Manual, 04/2014, A5E03586450A
Figure 2-5 Line Connection Module with Smart Line Module ≤ 800 A
Figure 2-6 Line Connection Module with Smart Line Module > 800 A
Figure 2-7 Line Connection Module with Smart Line Modules connected in parallel
2.4.4
Active Line Modules
Active Line Modules can supply energy to the DC link and return regenerative energy to the
line supply. A Braking Module and braking resistor are required only if the drives need to be
decelerated in a controlled manner after a power failure (i.e. when energy cannot be fed
back to the supply).
In contrast to Basic Line Modules and Smart Line Modules, Active Line Modules generate a
regulated DC voltage, which remains constant despite fluctuations in the line voltage.
However, in this case, the line voltage must remain within the permissible tolerance range.
Active Line Modules draw a virtually sinusoidal current from the line supply, and do not
cause any harmful harmonics.